[1] Likewise or similarly in other lexica. The headword is present participle of ἔνειμι (from εἰμί "I am"), neuter nominative/accusative singular. It must be quoted from somewhere (other than the quotation given here, which has the genitive plural) but is far too commonplace to track down.
[2] Aelian fr. 252b Domingo-Forasté (254 Hercher); cf. epsilon 1675 and lambda 620.